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Flights are cheapest on Tuesdays

In contrast, flying at the end of the week can cost up to 46 per cent more.

When looking at 40 of the UK’s most popular flight routes, all were found to be cheaper for departures between Monday and Thursday, as opposed to between Friday and Sunday.

This did not prevent the majority of people travelling on the most expensive days at the weekend however.

Of the 40 flight routes, 58 per cent were at their most affordable when leaving on a Tuesday, according to research carried out by Momondo, the flight comparison website.

The second cheapest day was Wednesday, for 28 per cent of routes, with the remaining 14 per cent cheapest on Monday or Thursday.

"The majority of Brits like to leave for a holiday at the end of the working week, preferring not to wait until Monday to set off,” said Julie Pedersen, a spokeswoman for momondo.

“However, we found that with some flexibility in your schedule, you can save a lot of money by departing in the beginning of the week instead.”

Other factors that travellers should take into account when trying to find the best price include the length of time before departure, the times of departures, the airport being used, the season and the number of airlines flying that route.

Telegraph Travel ran a spot check to find the cheapest one-way flight prices on different days: